Mold for forming insulators.



No. 801,461. PATENTED OCT. 10, 1905.

A KRIBS MOLD FOR FORMING INSULATORS'.

APPLICATION FILED FEB. 20,1905.

I IN VENT [71? UNITED STATES PATENT curios.

ANTHONY KRIBS, OF BROOKLYN, NEW YORK, ASSIGNOR TO B. V. LAM- BERSON, OFITHAOA, NEW YORK.

' MOLD FOR FORMlNG INSULATORS.

- Specification of Letters Patent.

Patented Oct. 10, 1905.

Application filed February 20, 1905. Serial No. 246,569.

Brooklyn, in the county of Kings, in the State of New York, haveinvented new and useful Improvements in Molds for Forming Insulators, ofwhich the following, taken in connection with the accompanying drawings,is a full, clear, and exact description.

This invention relates to improvements in molds for forming insulators,but is specially adapted for forming a particular style of insulatorhaving open-sided recesses in opposite sides for receiving an electricconductor, such as a wire, which is retained in the recesses againstaccidental displacement by cars or tongues which partially cover theopen sides of the recess, the adjacent faces of the tongues or earsbeing disposed in parallel inclined planes.

My object is to provide a simple sectional mold in which the sectionsare separable, but when brought together in operative positionconstitute a chamber having substantially the same form as the exteriorcontour'of the desired form of insulator.

One of the features of this invention is to enable the sections of themold to be separated without breaking or marring the contour of themolded insulator, which is of course green and more or less soft whilethe sections of the mold are being separated.

Other objects and uses relating to the specific structure of the moldwill be brought out in the following description.

In the drawings, Figure 1 is a top plan, partly in section, of myimproved mold shown in its closed position for receiving the material,as glass, kaolin, or other earthy substance, which may be adapted forinsulators of this character. Fig. 2 is a top plan of the parts seen inFig. 1, showing the movable sections as opened to permit the withdrawalof the molded insulator, the handles of the movable section being brokenaway. Fig. 3 is a longitudinal vertical sectional view taken on line 33, Fig. 1. Fig. 4 is an inner end face view of one of the mold-sectionsfor forming the diagonal groove and outer faces of the tongues or carsat one side of the insulator. Fig. 5 is a perspective view of theparticular form of insulator made by the mold seen in Figs. 1 to 3,inclusive.

In carrying out the objects stated I provide a somewhat heavy metalbase-section 1 with a recess or socket 2 opening from its top face andof such contour as to form the greater portion of the top of theinsulator seen in Fig. 5. This base-section 1 is preferably made ofcast-iron or other suitable material,

having its upper face substantially flat and disposed in a substantiallyhorizontal plane for receiving and supporting two similar but oppositemovable mold-sections 3 and 4, which are hinged to each other and to abracket 5 upon the rear side of the base-section 1 by a pivotal pin 6.

The socket or recess 2 is disposed substantially central in the base 1,and the pivotal pin 6 is disposed some distance at the rear of thesocket 2, While the movable sections 3 and 4, which are hinged upon thepivotal pin 6, extend forwardly at opposite sides and some distance infront of the socket 2 and are provided with suitable handles 7, by whichthe sections may be opened and closed, said handles being normally heldin their closed position'by asuitable locking-link 8.

The lower faces of the sections 3 and 4 are disposed in a flathorizontal plane substantially coincident with and ridingupon the topface of the base-section 1, and the central portions of these sections 3and 4 are of suflicient height to form the sides of the portion of theinsulator above the upper end of the socket 2. The adjacent meetingfaces of the sections 3 and 4: are formed with similar but opposedrecesses 9 of such dimensions and contour as to form the greaterportions of the insulator above the portion of such insulator which isformed in the socket 2, and therefore each of the recesses 9 issubstantially semicircular in formthat is, each recess 9 is made toembrace and form substantially half of the upper portion of theinsulator above the socket 2. The upright faces directly in front and atthe rear of the socket 2 meet when closed in a substantially verticalplane running through the axis of the insulator and are each formed witha pair of projecting tongues or lugs 10, which meet in such verticalplane to form open-ended slots 11 in the insulator, as 12.

The insulator which I desire to form, as best seen in Fig. 5, iscylindrical in general form, but is provided with a rounding orsubstantially semispherical top 13, a reduced central portion 14, andopposite pairs of bosses or raised portions 15, those of each pair being arranged above and beneath the reduced portion 14 and are formedwith lugs 16, which pro ect toward each other and partially bridgeacross the reduced portion 14.

The lugs 16, although tied to the main body and forming a part thereofabove and beneath the recess of the reduced portion 14, are separatedfrom the main body a sufficient distance to form the transverse slots11, which are of sufficient size both transversely and vertically toreceive any ordinary electric conductor, (not shown,) and the adjacentfaces of each pair of lugs 16 are disposed in inclined planessubstantially parallel with each other and separated a sufiicientdistance to permit the insertion of a wire therethrough such, forinstance, as the electric conductor. The opposite ends of these inclinedfaces, as 17, are disposed in different horizontal planes-- that is, oneend of the inclined slot, as 18, between the inclined faces 17 isdisposed in a different plane from the other endthe object of which isto prevent accidental displacement or removal of the electric conductorfrom the slot 11 when once inserted through the slot 18 between the cars16 and main body of the insulator. The principal feature of my inventionconsists in the means for forming the slot 11 and diagonal slots 18, andfor this purpose I provide the arms or sections 3 and 4 withindependently-movable moldsections 20, which are pivoted to theirrespective arms 3 and 4 by pivotal pins 21, which are located,respectively, at the rear and in front of the socket 2.

The greater portions of the side enlargements or bosses of the insulatorare formed by recesses 22 in the molds 3 and 4; but the free extremitiesor projections 16, as well as the slot 18, are formed by themold-section 20, each of which is provided with a substantially centraltongue 23 and lower and upper upright faces 24. Each tongue 23 isdisposed in an inclined plane at an angle with the top face of thebase-section 1 to form the diagonal groove 18, while the upright faces24 form the outer upright faces of the projection 16.

When the sections 3 and 4 are brought togethcr to the position seen inFig. 1, the moldsections slide upon the top face of the basesection 1,as best seen in Fig. 3, and enter recesses 25 in the adjacent faces ofthe sections 3 and 4, and the inner faces of the tongues 23 abut againstthe outer faces of the lugs 10, which form the circumferential slots 11.These several movable mold-sections 3, 4, and 20 are arranged andconstructed so that when they are brought to their closed position theyform a chamber of substantially the same contour as the upper portion ofthe insulator above the socket 2, as best seen in Fig. 3. The slots 18and tongues 23 at opposite sides of the insulator preferably incline inopposite directions, and the mold-sections 20 are pivotally connected tothe swinging mold-sections 3 and 4 in such manner that when the sections3 and 4 are opened the sections 20 will draw away from the insulator innearly opposite radial directions, as best seen in Fig. 2, so as toavoid mutilation of the insulator, which is comparatively soft when themovable moldsections are opened. The hinging of the moldsections 20 tothe swinging sections3 and 4, together with the fact that themold-sections 20 rest upon the top face of the base-section 1, is animportant feature of my invention, for the reason that all the movablesections may be withdrawn from the molded insulator by a singleoperation, the drag of the sections 20 upon the top face of thebase-section 1 facilitating the removal of such sections freely andwithout liability of mutilating the completed insulator.

When the sections 3 and 4 are brought together in the manner shown inFig. 1, they are held in this position by a suitable clamp 28, which ishinged at 29 to the front face of the base-section 1, so as to swing ina vertical plane into and out of engagement with opposite faces of thesections 3 and 4, it being understood that when in this position therecesses in the sections 3 and 4 are centered around the axis of thesocket 2, so as to form a continuation of the insulator-mold, the upperportion of which is open at the top to permit the insertion of thesemiliquid or plastic material which is to form the insulator.

In Fig. 3 I have shown the insulator 12 in section and as provided withacentral threaded socket 30 and an annular base-flange 31; but it is tobe understood that this threaded socket is formed by a separatemechanism which is not shown in this application, because it forms nopart of my present invention.

In operating my improved mold the sections 3 and 4 are brought togetherby hand to the position seen in Fig. 1, during which operation themold-sections 20, which are more or less inert and frictionally engagedwith the top face of the base-section 1, are caused to swing upon theirpivot 21 and to enter their respective recesses 25 in the sections 3 and4, after which the clamping element 28 is rocked upwardly to engage theopposite outer faces of the sections 3 and 4, as best seen in Figs. 1and 3, and, if desired, the handles 7 may be further locked together bymeans of the link 8. While in this position the tongues 10 are broughtinto engagement with each other and the tongues 23 are brought intoengagement with the outer upright faces of the tongues 10, while theupright faces 24 of the mold-sections 20 are registered with the wallsof their respective recesses 22, thus completing a continuous chamberwith the socket 2 of substantially the same contour as the outer surfaceof the insulator seen in Fig. 5. After the material in a more or lessliquid or plastic state is filled in the mold through the top openingand given sufficient time to set or assume a self-retaining conditionthe clamping members 8 and 28 are thrown out of operative position, andthe mold-sections3 and 4 are then opened to the position seen in Fig. 2,thereby drawing the mold-sections 20 from opposite sidesof the moldedinsulator until the tongues 23 are withdrawn from the grooves 18,whereupon the molded insulator when sufficiently hardened may be liftedor withdrawn from the socket 2 in the base-section 1.

Having thus described my invention. what 1 claim, and desire to secureby Letters Patent, is

1. A mold for forminginsulators of the class described,consisting of abase-section having a socket and a substantially flat horizontal topface, opposite similar mold-sections hinged to swing toward and fromopposite sides of the socket and upon the top face of the base-section,each of said hinged sections being provided with a pair of tonguesmoving together at opposite sides of the socket for formingcircumferential slots in theinsulator, and additional mold-sectionshinged to the swinging sections at opposite sides of the socket andprovided with tongues inclined at an angle with the top face of'the baseand cutting through the outer walls of said circumferential slots.

2. A mold for forming an insulator of the class described, consisting ofa base-section having a socket opening from its top face, additionalmold-sections hinged to move upon said top face of the base toward andfrom opposite sides of the socket, and provided with recesses forforming a continuation of the chamber in which the insulator is to beformed, said additional sections being each provided with a pair oftongues meeting at opposite sides of the socket for formingcircumferential grooves in opposite sides of the insulator,

I and a pair of swinging mold-sections, one

upon each of said additional sections and provided with a tonguedisposed in an inclined plane at an angle with the top face of thebasesection and operating to cut through the outer wall of thecircumferential slot for the purpose set forth.

8. A mold for forming the herein-described insulator consisting of abase-section having a socket for forming the top and portions of thesides of the insulator, opposite swinging sections having recesses forforming the sides and each provided with a pair of tongues for formingthe open-ended slots in opposite sides of the insulator, and additionalsections having inclined projections abutting when closed against theside faces of the tongues of the swinging sections.

4.. A mold for forming the herein-described insulator, said mold havinga chamber for forming the top and sides of the insulator, tongues on theopposite sides of the mold to form circumferential slots in theinsulator, and additional tongues extending inwardly from opposite sidesof the mold to the outer faces of the former tongues for formingopenings through the outer walls of the slots of the insulator.

5. A mold for forming the herein-described insulator, said mold having achamber for forming the top and sides of the insulator. tonguesprojecting circumferentially from opposite walls of the chamber, andadditional tongues projecting radially from said opposite sides of thechamber in planes intersecting the planes of the first-named tongues.

In witness whereof I have hereunto set my hand this 6th day of February,1905.

ANTHONY KRIBS.

Witnesses:

F. A. JENNINGS, EMILE A. KRIBS.

